TM 55-4920-394-13&P
MO
Item to be manufactured or fabricated at the Aviation Unit Maintenance level.
MF
Item to be manufactured or fabricated at the Aviation Intermediate
maintenance level.
MD
Item to be manufactured or fabricated at the depot maintenance level.
AO
Item to be assembled at the Aviation Unit Maintenance level.
AF
Item to be assembled at the Aviation Intermediate Maintenance level.
AD
Item to be assembled at depot maintenance level.
XA
Item is not procured or stocked because the requirements for the item will
result in the replacement of the next higher assembly.
XB
Item is not procured or stocked. If not available through salvage, requisition.
XD
A support item that is not stocked. When required, item will be procured
through normal supply channels.
XC
Installation drawing, diagram, instruction sheet, field service drawing, that is
identified by manufacturer's part number.
NOTE
Cannibalization or salvage may be used as a source of supply for any items source coded above except
those coded XA and aircraft support items as restricted by AR 700-42.
(2) Maintenance Code. Maintenance codes are assigned to indicate the levels of maintenance authorized
to USE and REPAIR support items. The maintenance codes are entered in the third and fourth positions of the
Uniform SMR Code format as follows:
(a) The maintenance code entered in the third position will indicate the lowest maintenance level
authorized to remove, replace and use the support item. The maintenance code entered in the third position
will indicate one of the following levels of maintenance:
Code
Application/Explanation
O
Support item is removed, replaced, used at the Aviation Unit Maintenance
level.
F
Support item is removed, replaced, used at the Aviation Intermediate
Maintenance level.
D
Support items that are removed, replaced, used at depot, mobile depot,
specialized repair activity only.
(b) The maintenance code entered in the fourth position indicates whether the item is to be repaired and
identifies the lowest maintenance level with the capability to perform complete repair (i.e., all authorized
maintenance functions). This position will contain one of the following maintenance codes:
Code
Application/Explanation
O
The lowest maintenance level capable of complete repair of the support item is
the Aviation Unit Maintenance level.
F
The lowest maintenance level capable of complete repair of the support item is
the Aviation Intermediate Maintenance level.
D
The lowest maintenance level capable of complete repair of the support item is
the depot level.
L
Repair restricted to designated specialized repair activity.
Z
Nonreparable. No repair is authorized.
B
No repair is authorized. The item may be reconditioned by adjusting,
lubricating, etc., at the user level. No parts or special tools are procured for
the maintenance of this item.
(3) Recoverability Code. Recoverability codes are assigned to support items to indicate the disposition
action on unserviceable items. The recoverability code is entered in the fifth position of the Uniform SMR Code
format as follows:
Code
Definition
Z
Nonreparable item. When unserviceable, condemn and dispose at the
level indicated in position 3.
O
Reparable item. When economically reparable, condemn and dis ose at
p
Aviation Unit Maintenance level.
F
Reparable item. When uneconomically reparable, condemn and dispose at the
Aviation Intermediate Maintenance level.
D
Reparable item. When beyond lower
level repair capability, return to depot. Condemnation and disposal not
authorized below depot level.
C-2
Change 1
